Fitting a new raw water pump on a Volvo Penta D1-30B

Another in our series about maintaining a small marine diesel engine. In this video, an engine overheat alarm sounds when we are at sea and we need to identify the fault and get home. Once in the safety of Weymouth Marina we replace our failed raw water pump. 00:00 Breakdown at sea 01:44 NASA EX-1 Exhaust alarm 03:20 Fault finding the raw water cooling system 04:33 A 'get you home' workaround repair 05:53 Fitting a new pump 07:47 and we are up and working once again